Q: flow control valve works with a brief introduction of

A: The usual flow control valve includes a throttle valve, an exhaust throttle.

Flow Control Valve Features:

According to the actual requirements of the design or set the flow, the system can automatically eliminate the pressure fluctuations and maintain constant flow.

Enthusiasm overcome system, improve the heating (cooling) quality.

Proximal pressure to solve the large and small distal pressure contradiction.

Reducing the circulating water system, reduce system resistance.

Designed to reduce the workload on the network do not need cumbersome hydraulic balance calculations.

Reduce the difficulty of adjusting net, the net transfer of work to simplify the complex for a simple traffic distribution.

Eliminating much heat pipe heat flow when switching redistribution of work.

Flow display values are random test bench calibration, flow (m3 / h).

Flow control valve works with a brief introduction of

An adjustment valve and the valve orifice area and local resistance between the traffic it generates adjusted to control the movement speed of the actuator. Flow control valve use is divided into five kinds.

(1) shunt valve: Two actuators regardless of load size, make the same oil source has been equal to the same amount of traffic diverter valve or valve synchronization; get allocated in proportion to the ratio of the flow diverter valve.

Flow control valve

(2) flow valve: the role of the diverter valve contrary, flowing manifold valve flow prorated.

(3) shunt valve manifold: both shunt valve and manifold valve two functions.

(4) Throttle: When it is set orifice area, make little change in load pressure and velocity of the actuator movement demanding uniformity basically stable. Flow control valve

(5) control valve: When the load pressure changes can keep the throttle valve differential pressure is constant. Thus, in the orifice area after it is set, regardless of how changes in load pressure, control valve can

To maintain constant flow through the throttle valve, so that movement of the actuator speed stability.

The basic performance requirements flow valve

(1) Flow adjustment range, in the provision of inlet and outlet pressure regulating valve opening to change the scope of the minimum and maximum stable flow of traffic between the maximum and minimum flow steady flow

The ratio is generally 50 or more.

(2) Traffic - stiffness characteristics that output flow pressure flow valve can remain stable, unaffected by changes in the external load. T is represented by the speed of the rigid, rigid T bigger the better speed, better rigidity speed control valve, throttle speeds less rigid.

(3) pressure loss is throttling the flow control valve type resistance element, there must be some pressure loss at work. To avoid excessive power loss, the pressure loss through the predetermined rated flow, generally is 0.4MPa or less, when the high pressure up to 0.8MPa.

(4) linear regulator when using the hand wheel adjustment, requiring action light, adjust the small force. Rate of change of angle of rotation of the handwheel and the flow rate should be as uniform as possible, adjusting the linearity.

(5) the amount of leakage flow valve is closed from flowing out of the chamber into the oil leak will affect the minimum amount of stable flow valve, so the amount of internal leaks as small as possible.

(6) Other work oil temperature can affect the viscosity of the flow leaving the change, and therefore, often used for oil temperature insensitive thin wall orifice.

Flow control valve conditions of use

A flow control valve of the inflatable pipe inlet valve should be set.

2 flow control valve to send cement should be less than 1% water content, temperature no higher than 120 ℃, no miscellaneous slag and clumps.

3 Install the slope should be within the range of 6% to 14%.

4 Flow control valve requires pressure 4.0-5.KPa, need air volume 1.5-2.0m [3] / m [2] .min.

Performance

A flow and other parameters should be consistent with the provisions of Table 3.4.

2 flow control valve should be accurate and reliable control of material flow.

When the three flow control valve work, the flanges are not allowed junction leakage.

Assembly requirements

1. All parts must be inspected before assembly, purchased parts, the Association must be tested before assembly in accordance with relevant standards and have product quality certificate.

2 breathable layer assembly shall comply with the relevant provisions of ZBQ92002.

3 Housing Flange should be tight without leakage.

4 actuators should reach full flow control valve is fully closed

Conditions of Use

A flow control valve of the inflatable pipe inlet valve should be set.

2 flow control valve to send cement should be less than 1% water content, temperature no higher than 120 ℃, no miscellaneous slag and clumps.

3 Install the slope should be within the range of 6% to 14%.

4 Flow control valve requires pressure 4.0-5.KPa, need air volume 1.5-2.0m [3] / m [2] .min.

Performance

A flow and other parameters should be consistent with the provisions of Table 3.4.

2 flow control valve should be accurate and reliable control of material flow.

When the three flow control valve work, the flanges are not allowed junction leakage.

Assembly requirements

1. All parts must be inspected before assembly, purchased parts, the Association must be tested before assembly in accordance with relevant standards and have product quality certificate.

2 breathable layer assembly shall comply with the relevant provisions of ZBQ92002.

3 Housing Flange should be tight without leakage.

4 actuators should reach full flow control valve is fully closed. The product should comply with the standards and procedures approved product plans and technical documents pretend been manufactured in accordance with the provisions of installation and use. Where the standard drawings and technical documents at the end of the technical requirements, shall comply with the general standard of national standards, building materials industry and electromechanical industry requirements. Linear dimensions of machined parts by the end of the injection tolerance GB / T1804 in m level. Welding shall comply with the provisions of JC532, in which the surface quality of welded joints of not less than grade Ⅲ; size tolerance level not less than c. Iron castings shall comply with the provisions of GB9439. Castings shall comply with the provisions of JC401.2-401.4.

Flow control valve flow area by changing the flow control valve to achieve, cylinders and other actuators to control the velocity of pneumatic components. From the point of view of fluid mechanics, flow control is the use of a device in a pneumatic circuit caused local resistance, and by changing the size of the local resistance to achieve the purpose of regulating traffic. There are ways to achieve flow control in two ways: one is to set a fixed local resistance device, such as a capillary tube, plate and so on; the other is a set of local resistance device can be adjusted, such as throttle.